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Multi-leaf area measuring method for improving precision

A measurement method and technology of leaf area, applied in the direction of measurement device, optical device, image data processing, etc., can solve the problems of low precision, unsuitable measurement, cumbersome procedures, etc.

Inactive Publication Date: 2018-11-06
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graph paper method and photocopy quality method need to manually draw or cut out the edge of the leaf, the workload is heavy, the operation is complicated, and the application is not wide. If the shape of the edge of the leaf is complex, the error will be large
Determining the length and width of leaves to establish a regression equation requires extracting leaf shape parameters from a large number of leaves and establishing a regression equation to calculate leaf area. This method requires manual collection of a large number of samples and manual measurement. The procedure is cumbersome and the accuracy is not high.
The leaf area measurement method is fast, but it is expensive, inconvenient to maintain, and the measurement accuracy is greatly affected by the structure of the crop population, and it is not suitable for measuring the area of ​​leaves that are too long or too wide

Method used

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  • Multi-leaf area measuring method for improving precision
  • Multi-leaf area measuring method for improving precision
  • Multi-leaf area measuring method for improving precision

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Pre-photographing preparation: place multiple leaves on the stage, cover the leaves with a glass cover, turn on the power of the parallel light source on the stage, the entire stage panel presents a white highlighted background, and the image color of the leaf appears out green.

[0117] Image acquisition: Use a mobile phone or digital camera to face the stage panel directly, so that the camera field of view can cover the entire stage, adjust the focal length to take pictures, and the image must be clear and free from jitter and blur.

[0118] Image geometric correction: use the mobile terminal image processing APP software or the PC terminal image processing software to process the photographed image, first identify the corresponding positions of the four vertices of the stage and the center mark point on the image, and then perform geometric correction on the image , the geometry correction algorithm is described above.

[0119] Image segmentation and binarization: U...

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Abstract

The invention discloses a high-precision multi-leaf area measuring method, including the following steps: early photographing preparation; image acquisition; geometric correction of an image; image segmentation and binarization; sub-pixel edge extraction; calculation effective pixels of an objective table and leaves; removal of isolated noisy points; and leaf area calculation. The high-precision multi-leaf area measuring method provided by the invention adopts an image sub-pixel edge extraction technology, thereby improving the measurement precision of the leaf area; and utilizes an image processing technology to automatically calculate the leaf area, thereby improving the measurement efficiency.

Description

technical field [0001] The invention belongs to the technical field of crop growth information measurement, and in particular relates to a multi-leaf area measurement method for improving accuracy. Background technique [0002] Leaf is an important photosynthetic organ of plants and the main place for plants to transpiration. The size of leaves has a very significant impact on plant growth and development, crop yield and cultivation management. Therefore, obtaining accurate leaf area of ​​crops is one of the important research tasks in the field of ecological agriculture information detection, and it has very important research significance for evaluating crop growth and establishing plant growth models. [0003] The conventional and more mature methods of leaf area measurement include coordinate paper method, copy weighing method, method of measuring leaf length and width to establish regression equation, leaf area meter method, etc. The graph paper method and copy weighin...

Claims

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Application Information

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IPC IPC(8): G06T7/12G06T7/13G06T7/136G06T5/00G01B11/28G01B11/00
CPCG06T7/12G06T7/13G06T7/136G01B11/002G01B11/28G06T2207/30188G06T5/80
Inventor 刘哲黄文准张善文
Owner XIJING UNIV
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